.da{
    width: 100%;
    height:99vh;
    background: url('../tu/pageBg10.png');
    position: absolute;
}
.head{
    width: 100%;
    height: 50px;
    color: white;
    background: url('../tu/titleBg15.png');
    position: absolute;
    h1{
        position: relative;
        top: 17px;
        left: 340px;
    }
    span{
           position: relative;
           right: -680px;
    }
}
.left{
     position: relative;
     margin-top: 50px;
     margin-left: 5px;
    width: 220px;
    height: 85vh;
    /* background: pink; */
     float: left;

    .a1{
        width: 200px;
        height: 27vh;
        /* background: red; */
        border: 2px solid #1D487A;
    }
    .a2{
        width: 200px;
        height: 27vh;
        /* background: red; */
        border: 2px solid #1D487A;
        margin-top: 2px;
    }
    .a3{
        width: 200px;
        height: 28vh;
        /* background: red; */
        border: 2px solid #1D487A;
        margin-top: 2px;
    }
    
    
    
}

.zhong{
      position: relative;
     margin-top: 50px;
     margin-left: 30px;
    width: 280px;
    height: 85vh;
    /* background: pink; */
    float: left;
   .ditu{
        width: 280px;
        height: 45vh;
        /* background: red; */
          border: 2px solid #1D487A;
    }
    .wen{
        margin-top: 10px;
         width: 280px;
        height: 33vh;
        /* background: red; */
          border: 2px solid #1D487A;
    }
}
 
    
.right{
     position: relative;
     margin-top: 50px;
     margin-left: 10px;
    width: 220px;
    height: 90vh;
    /* background: pink; */
    float: left;
   
}
 .b1{
        width: 200px;
        height: 40vh;
        /* background: red; */
        border: 2px solid #1D487A;
    }
    .b2{
        width: 200px;
        height: 38vh;
        /* background: red; */
        border: 2px solid #1D487A;
        margin-top: 5px;
    }